Juvenile rheumatoid arthritis
(Science: pathology) juvenile rheumatoid arthritis (JRA) is a form of rheumatoid arthritis in children that generally occurs prior to age 16. In contrast with the adult type, a fever is more pronounced. Cardiac involvement with pericarditis is more common. The arthritis favors one or more large joints and can interfere with normal bone growth. A positive rheumatoid factor is seen more uncommonly in this form of arthritis. Treatment is similar to the adult form of the disease. Up to 75% recover with treatment. Less than 10% are severely disabled by JRA.